Bareilles, 31, will fill the vacancy left by departing judge — Pussycat Dolls singer Nicole Scherzinger — who left the singing contest after two seasons to join Simon Cowell’s US version of “The X Factor.”

Singer/songwriter Ben Folds and Boyz II Men member Shawn Stockman also serve as judges on the acapella competition, hosted by former 98 Degrees singer Nick Lachey.

“I’m extremely excited to be joining the panel of judges for ‘The Sing-Off’ this fall!” Bareilles said in a statement.

“A cappella music is very near and dear to my heart, and I have been a huge fan of the show from the beginning. I love the opportunity to be a part of something that celebrates a genre of music that I just adore and believe in. I can’t wait for it to start,” the Grammy-nominated artist added.